My cat Wylie (1 yr. old M. Coon) has done this a couple times now.
The cats have their 'own room' where we keep their food, cat box, etc. Sometimes we shut the door to keep the dog out, or when there is a lot of going in & out, and they are indoor kitties who door-dash.
It sounds like Wylie is fiddling at the door, and sometimes like he is throwing himslf at it. The next thing you know is.....here he comes out the door.

The first time it happened I thought my husband left the door ajar, but then it happened a short time later when he was gone.